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229 Answered Questions for the topic astronomy

04/15/20

Identify and explain what type of solar event has just been described. Are the dangers from this solar event more likely to damage satellites, ground-based power grids, and/or unprotected astronauts.
We have detected a major increase in the solar wind from the Sun. The density and speed of material headed towards Earth has increased rapidly. Shortly before this satellites in orbit of the Sun... more
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04/13/20

Independence Day Movie Question
In the opening scene, the alien spacecraft is seen near the Earth's Moon. The Moon is shown to be vibrating due to the mass of the spacecraft. Is this scene plausible? Explain your reasoning? 
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03/10/20

What is the luminosity of this star?

A star observed has a brightness of 0 W·m-2 and has a distance determined to be 6.41×1017 m (16.60 parsecs). Use the equation: B=L/4(pi)d2 to solve this problem.Thank you!!
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02/27/20

If light takes millions of years to reach us
...are we seeing black holes feeding in the past?
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02/25/20

What is an Astronist?
I just heard a person call themselves an Astronist, but not sure what religion they are following and what they actually believe? I guess its something to do with astronomy and space!
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02/13/20

Examine the force of gravity between the two cases below
Case A: Two objects, one with a mass of 8 kilograms and the other with a mass of 1 kilograms, are located 40 meters from each other.Case B: Two objects, one with a mass of 37 kilograms and the... more
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02/10/20

The mutual gravitational attraction between two masses in space is 524 Newtons. What is the new gravitational force between these masses if the distance between them is increased by a factor of 8.1?

Need to find the new gravitational force of the distance given between the masses.
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02/10/20

Mutual gravitational attraction between two masses in space is 4,170 Newtons. What is the new gravitational force between these masses if the distance changes from 864 kilometers to 371 kilometers?
Need to find the new gravitational force when the distances given change.
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02/10/20

An astronaut weighs 198 pounds in his spacesuit when weighed on Earth. What would this astronaut weigh on a planet whose mass is 3.8 Earth masses and whose radius is 1.3 Earth radii?

Need to find the weight of this astronuat in pounds.
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02/09/20

You have discovered the planet Zoltron. It is 16.0 times farther from the Sun than Earth (16.0 AU). How long does it take this planet to go once around the Sun?
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01/05/20

why can't we attach messages to moving stars that will eventually leave the system
Recently a high velocity star was discovered in Australia. I read a National Geographic article that said it would reach another galaxy in 100 million years and that led me to wonder, what if we... more
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12/16/19

Surface of the sun
At what altitude from the surface of the sun does space begin?
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12/13/19

What state of matter is a black hole?
Is it an absence of matter? Or what?
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12/04/19

White Holes mistaken for Quasars??
Could a quasar be a white hole? If a black hole pulls in everything including light, while breaking down time as you speed up through the accretion disk till you reach the event horizon, could a... more
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11/18/19

In a paragraph, explain the life cycle of (i) a white dwarf, (ii) a neutron star, and (iii) ablack hole. You should cover every stage.
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11/11/19

Astronomy Help With Question
What is the final "ash" at the core of a high-mass star, which cannot fuse into anything heavier?
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11/03/19

How is the Earth not the center of the Universe?
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10/29/19

A star produces a continuous spectrum from its what?
Precise terminology, related to Astronomy, stars, spectrums
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10/02/19

Calculate redshift of a Galaxy using recession velocity and distance
A galaxy is receding away from us with a recession velocity of 100,000 km s^−1. What is the distance to this galaxy? (Don't input the distance, just calculate it.) What is the redshift z of this... more
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09/21/19

Flux of sunlight on Earth
The luminosity of the Sun is 4∗10^33 erg s^−1, and its distance to the Earth is 1.5∗10^13 cm.What is the flux of sunlight on the Earth, in units of erg s^−1 s^−1 cm^−2?
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09/18/19

Is it possible for two black holes to collide perfectly?
If two blackholes with exactly the same mass, are traversing the universe on a perfect collision course with no other gravitational force effecting either black hole, what would happen to both... more
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09/18/19

What happens to a star when its binary star goes supernova?
Taking into account two binary stars, if relatively close, what would happen when one star goes supernova before the other? Does that binary simply rip apart?
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09/18/19

How large does a star need to be for its supernova to produce element 115
How large does a star need to be for its supernova or hypernova / collapsar to produce super heavy elements like 115?Also, how abundant are these stars in the universe?
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09/18/19

distance from the sun in 47 years
what would be the average distance from the sun in astronomical units of a comet with a period of 47 years?
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09/13/19

A half circle , stretching from horizon to horizon, would comprise _______________ degrees
A)360b)75c)220d)180
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